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What's a good way to clean fungus from old film (some from 1950 to 1980)? I've inherited some 35mm slides and about half have some degree of contamination.
It looks like wispy strands and I've had success using a cotton bud and 99.9% IPA, but sometimes the IPA wicks humidity from the air and makes the emulsion soft which the cotton bud scratches if I'm not careful.
picrel is a really bad one that I can't fix.